4.0 OHV Oil Leak - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 08-24-2010
Thread Starter
Join Date: Aug 2010
Location: La Mesa, Ca
Posts: 5
4.0 OHV Oil Leak

I have a decent oil leak coming from the front of the drivers side of the engine on my 1996 4.0 Ranger. It doesn't pool up but its enough to get my driveway dirty. I pulled the upper intake to do some other work and get a better look at the same time and it doesn't look like the valve cover is leaking. I'm wondering what other areas could be the source of the leak. The truck only has 48k on it (I know, both I and the previous owner don't drive much) so I am a bit reluctant to pull the engine. If anyone has any ideas please let me know.

Thank you
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Old 08-24-2010
My91Ranger's Avatar
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Join Date: Apr 2007
Location: Roseville, Michigan
Posts: 2,252
I would start by degreasing and cleaning the leaky area so that you can pin point where the leak is coming from. If your still having trouble figuring out where its coming from take some pictures and post them up.
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Old 08-24-2010
djfllmn's Avatar
Join Date: Mar 2009
Location: York, PA
Posts: 5,796
im not sure on which 4.0 motor or exactly what its for but i know there is a TSB out for an oil leak problem on the 4.0
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Old 08-24-2010
Alex98's Avatar
Join Date: Jul 2007
Location: Baltimore, Maryland
Posts: 844
OHV's have 2 problems. 1. Faulty rear main seal. 2. Poor oil circulation in valvetrain. that might be the cause but i doubt it since its so low miles (rear main).
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